Near the end of the film, when Robert is talking to Ben across the street of Sam's school, Robert's head keeps changing positions between shots. In one shot he is looking toward Ben and in another shot he is looking at the school, then it goes back to the other shot when hes looking at Ben.
Abbie is riding in a car. Seen from the front, her headrest is missing, but from the rear, it's present.
In the end credits, Illeana Douglas is named "Elizabeth Ryder", but her character's name plate on the desk visible in the movie reads "Caroline Ryder".